what is the best way to learn on this platform efficiently.

Question

1.One should complete one course at a one time or can strat more then one.
2.when ? some one should start giving challenges.

Answer 1

This might help you-

https://www.sololearn.com/Discuss/978660/?ref=app
https://www.sololearn.com/Discuss/935669/?ref=app
https://www.sololearn.com/Discuss/264670/?ref=app

A suggestion to read this post-

https://www.sololearn.com/discuss/321242/?ref=app